172-65694MA-01 (BD800) 25 Jul 2018
7
Preventing Erroneous Operation of the Valve Stem
The product is equipped with a function that prevents erroneous operation of the
valve. A hole in the spanner cap allows the spanner cap to be fixed by passing a
wire/steel wire and tightening it around the piping or flange as shown below.
Restricting movement of the spanner cap prevents the valve from being operated
erroneously.
Spanner Cap
Hole
Wire/
Steel Wire
Piping
Relation between CV / Kvs Values and No. of Turns of the Valve Stem
3.5
3
2.5
2
1.5
1
0.5
0
0
1
2
3
4
5
3.5
3
2.5
2
1.5
1
0.5
0
0
1
2
3
4
5
3.5
3
2.5
2
1.5
1
0.5
0
0
1
2
3
4
5
Cv
(U
S)
No. of turns*
Cv
(U
K)
KV
No. of turns*
No. of turns*
*No. of turns of the valve stem is based on the fully closed position
